Fergus was born about 1569 in Plomp, Cumberland, England, the son of Matthias Graham but his mother is unknown.
He has died but the date and place are unknown.
His wife was Sibill Beall, who he married in 1624. The place has not been found. Their four known children were Richard (c1580-1653), William (?-1631), Reginald (?-<1685) and Francis (1614-?).